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Q:

What are the main components of Brass Alloy?

A) Copper and Zinc B) Copper and Strontium
C) Copper, Zinc and Nickel D) Copper and Nickel
 
Answer & Explanation Answer: A) Copper and Zinc

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Q:

Which of the following elements has the lowest melting point?

A) Zinc B) Titanium
C) Sulphur D) Fluorine
 
Answer & Explanation Answer: D) Fluorine

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Q:

The phosphorus cycle differs from the biogeochemical cycles in that

A) does not have atmospheric reservoir B) uses water more
C) have atmospheric reservoir D) None of the above
 
Answer & Explanation Answer: A) does not have atmospheric reservoir

Explanation:

Unlike other gas cycles, the phosphorus cycle differs in having atmospheric reservoir. No other gases are involved in it.

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Q:

Barium loses ____ electrons to achieve noble gas electron configuration.

A) 1 B) 2
C) 3 D) 4
 
Answer & Explanation Answer: B) 2

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Q:

Which of the following is used as anaesthetics?

A) N2 B) N2O
C) CH4 D) CO2
 
Answer & Explanation Answer: B) N2O

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Q:

Which molecule is used up in photosynthesis?

A) Water B) Carbohydrates
C) Oxgen D) Sugar
 
Answer & Explanation Answer: A) Water

Explanation:

The first step in photosynthesis is to split the water molecule using sun light.

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Q:

Bee sting contains________________

A) An acidic liquid B) a salt solution
C) an alkaline liquid D) a corrosive liquid
 
Answer & Explanation Answer: A) An acidic liquid

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Q:

The volume of 10 g of gas X is 5.6 litre at NTP. What is the molecular weight of X?

A) 40 B) 60
C) 50 D) 20
 
Answer & Explanation Answer: A) 40

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